520503885 has 72 divisors (see below), whose sum is σ = 1001920920. Its totient is φ = 249765120.

The previous prime is 520503883. The next prime is 520503967. The reversal of 520503885 is 588305025.

520503885 is a `hidden beast` number, since 520 + 50 + 3 + 8 + 85 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 171636201 + 348867684 = 13101^2 + 18678^2 .

It is not a de Polignac number, because 520503885 - 2¹ = 520503883 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520503883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 593067 + ... + 593943.

Almost surely, 2^520503885 is an apocalyptic number.

520503885 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

520503885 is a deficient number, since it is larger than the sum of its proper divisors (481417035).

520503885 is a wasteful number, since it uses less digits than its factorization.

520503885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 520503885 is about 22814.5542362765. The cubic root of 520503885 is about 804.4048093270.

It can be divided in two parts, 520 and 503885, that added together give a palindrome (504405).

The spelling of 520503885 in words is "five hundred twenty million, five hundred three thousand, eight hundred eighty-five".